[morzh]

7000 Ohms is the plate load for the 6F6, which is the Voice coil impedance (say, 2 Ohms) multiplied by the square of the turn ratio (say, 3600, in case of the 60:1), which is what plate will see when the primary is connected.
The primary itself will probably be showing 0.5 to 1kOhm of resistance if measured directly with a meter.

1K is actually a resistance of the field coil and not the inductance; the old speakers list the actual DC resistance. Philco field coil (from my 20) measured exactly what it said on the coil.

I bought this:

http://www.ebay.com/itm/OT8SE-Tube-Outpu...9422890997

This is an SE transformer, 7K primary at a possible 3.2 Ohms voice coil. Should suffice, I think, and the 10W rating is more than enough.

PS. Just received it.